// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/basictypes.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/point_base.h"
#include "ui/gfx/geometry/point_conversions.h"
#include "ui/gfx/geometry/point_f.h"

namespace gfx {

namespace {

    int TestPointF(const PointF& p)
    {
        return p.x();
    }

} // namespace

TEST(PointTest, ToPointF)
{
    // Check that implicit conversion from integer to float compiles.
    Point a(10, 20);
    float x = TestPointF(a);
    EXPECT_EQ(x, a.x());

    PointF b(10, 20);
    EXPECT_EQ(a, b);
    EXPECT_EQ(b, a);
}

TEST(PointTest, IsOrigin)
{
    EXPECT_FALSE(Point(1, 0).IsOrigin());
    EXPECT_FALSE(Point(0, 1).IsOrigin());
    EXPECT_FALSE(Point(1, 2).IsOrigin());
    EXPECT_FALSE(Point(-1, 0).IsOrigin());
    EXPECT_FALSE(Point(0, -1).IsOrigin());
    EXPECT_FALSE(Point(-1, -2).IsOrigin());
    EXPECT_TRUE(Point(0, 0).IsOrigin());

    EXPECT_FALSE(PointF(0.1f, 0).IsOrigin());
    EXPECT_FALSE(PointF(0, 0.1f).IsOrigin());
    EXPECT_FALSE(PointF(0.1f, 2).IsOrigin());
    EXPECT_FALSE(PointF(-0.1f, 0).IsOrigin());
    EXPECT_FALSE(PointF(0, -0.1f).IsOrigin());
    EXPECT_FALSE(PointF(-0.1f, -2).IsOrigin());
    EXPECT_TRUE(PointF(0, 0).IsOrigin());
}

TEST(PointTest, VectorArithmetic)
{
    Point a(1, 5);
    Vector2d v1(3, -3);
    Vector2d v2(-8, 1);

    static const struct {
        Point expected;
        Point actual;
    } tests[] = {
        { Point(4, 2), a + v1 },
        { Point(-2, 8), a - v1 },
        { a, a - v1 + v1 },
        { a, a + v1 - v1 },
        { a, a + Vector2d() },
        { Point(12, 1), a + v1 - v2 },
        { Point(-10, 9), a - v1 + v2 }
    };

    for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i)
        EXPECT_EQ(tests[i].expected.ToString(), tests[i].actual.ToString());
}

TEST(PointTest, OffsetFromPoint)
{
    Point a(1, 5);
    Point b(-20, 8);
    EXPECT_EQ(Vector2d(-20 - 1, 8 - 5).ToString(), (b - a).ToString());
}

TEST(PointTest, ToRoundedPoint)
{
    EXPECT_EQ(Point(0, 0), ToRoundedPoint(PointF(0, 0)));
    EXPECT_EQ(Point(0, 0), ToRoundedPoint(PointF(0.0001f, 0.0001f)));
    EXPECT_EQ(Point(0, 0), ToRoundedPoint(PointF(0.4999f, 0.4999f)));
    EXPECT_EQ(Point(1, 1), ToRoundedPoint(PointF(0.5f, 0.5f)));
    EXPECT_EQ(Point(1, 1), ToRoundedPoint(PointF(0.9999f, 0.9999f)));

    EXPECT_EQ(Point(10, 10), ToRoundedPoint(PointF(10, 10)));
    EXPECT_EQ(Point(10, 10), ToRoundedPoint(PointF(10.0001f, 10.0001f)));
    EXPECT_EQ(Point(10, 10), ToRoundedPoint(PointF(10.4999f, 10.4999f)));
    EXPECT_EQ(Point(11, 11), ToRoundedPoint(PointF(10.5f, 10.5f)));
    EXPECT_EQ(Point(11, 11), ToRoundedPoint(PointF(10.9999f, 10.9999f)));

    EXPECT_EQ(Point(-10, -10), ToRoundedPoint(PointF(-10, -10)));
    EXPECT_EQ(Point(-10, -10), ToRoundedPoint(PointF(-10.0001f, -10.0001f)));
    EXPECT_EQ(Point(-10, -10), ToRoundedPoint(PointF(-10.4999f, -10.4999f)));
    EXPECT_EQ(Point(-11, -11), ToRoundedPoint(PointF(-10.5f, -10.5f)));
    EXPECT_EQ(Point(-11, -11), ToRoundedPoint(PointF(-10.9999f, -10.9999f)));
}

TEST(PointTest, Scale)
{
    EXPECT_EQ(PointF().ToString(), ScalePoint(Point(), 2).ToString());
    EXPECT_EQ(PointF().ToString(), ScalePoint(Point(), 2, 2).ToString());

    EXPECT_EQ(PointF(2, -2).ToString(),
        ScalePoint(Point(1, -1), 2).ToString());
    EXPECT_EQ(PointF(2, -2).ToString(),
        ScalePoint(Point(1, -1), 2, 2).ToString());

    PointF zero;
    PointF one(1, -1);

    zero.Scale(2);
    zero.Scale(3, 1.5);

    one.Scale(2);
    one.Scale(3, 1.5);

    EXPECT_EQ(PointF().ToString(), zero.ToString());
    EXPECT_EQ(PointF(6, -3).ToString(), one.ToString());
}

TEST(PointTest, ClampPoint)
{
    Point a;

    a = Point(3, 5);
    EXPECT_EQ(Point(3, 5).ToString(), a.ToString());
    a.SetToMax(Point(2, 4));
    EXPECT_EQ(Point(3, 5).ToString(), a.ToString());
    a.SetToMax(Point(3, 5));
    EXPECT_EQ(Point(3, 5).ToString(), a.ToString());
    a.SetToMax(Point(4, 2));
    EXPECT_EQ(Point(4, 5).ToString(), a.ToString());
    a.SetToMax(Point(8, 10));
    EXPECT_EQ(Point(8, 10).ToString(), a.ToString());

    a.SetToMin(Point(9, 11));
    EXPECT_EQ(Point(8, 10).ToString(), a.ToString());
    a.SetToMin(Point(8, 10));
    EXPECT_EQ(Point(8, 10).ToString(), a.ToString());
    a.SetToMin(Point(11, 9));
    EXPECT_EQ(Point(8, 9).ToString(), a.ToString());
    a.SetToMin(Point(7, 11));
    EXPECT_EQ(Point(7, 9).ToString(), a.ToString());
    a.SetToMin(Point(3, 5));
    EXPECT_EQ(Point(3, 5).ToString(), a.ToString());
}

TEST(PointTest, ClampPointF)
{
    PointF a;

    a = PointF(3.5f, 5.5f);
    EXPECT_EQ(PointF(3.5f, 5.5f).ToString(), a.ToString());
    a.SetToMax(PointF(2.5f, 4.5f));
    EXPECT_EQ(PointF(3.5f, 5.5f).ToString(), a.ToString());
    a.SetToMax(PointF(3.5f, 5.5f));
    EXPECT_EQ(PointF(3.5f, 5.5f).ToString(), a.ToString());
    a.SetToMax(PointF(4.5f, 2.5f));
    EXPECT_EQ(PointF(4.5f, 5.5f).ToString(), a.ToString());
    a.SetToMax(PointF(8.5f, 10.5f));
    EXPECT_EQ(PointF(8.5f, 10.5f).ToString(), a.ToString());

    a.SetToMin(PointF(9.5f, 11.5f));
    EXPECT_EQ(PointF(8.5f, 10.5f).ToString(), a.ToString());
    a.SetToMin(PointF(8.5f, 10.5f));
    EXPECT_EQ(PointF(8.5f, 10.5f).ToString(), a.ToString());
    a.SetToMin(PointF(11.5f, 9.5f));
    EXPECT_EQ(PointF(8.5f, 9.5f).ToString(), a.ToString());
    a.SetToMin(PointF(7.5f, 11.5f));
    EXPECT_EQ(PointF(7.5f, 9.5f).ToString(), a.ToString());
    a.SetToMin(PointF(3.5f, 5.5f));
    EXPECT_EQ(PointF(3.5f, 5.5f).ToString(), a.ToString());
}

} // namespace gfx
